Does anyone know of any matte painting tutorials online?

I just bought a wacom tablet a few days ago, and i've never used one this is my first time doing a matte painting and im a little unsure of what to do :/ i have a rough draft due next week, i just sketched everything out. in my rough draft, i cant use any photographic elements, just paint. im really unsure about what to do next. Do i scan it into photoshop? then what? is there a tutorial online that can help? Any tips or advice is greatly appreciated, thanks a bunch :)